Malicious PDF — malware analysis report

Static analysis result for SHA-256 97e0992b2a54652b…

MALICIOUS

PDF

37.4 KB Created: 2020-08-22 02:41:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5364bfa35c11e76d16a8966e559ecda SHA-1: 68a29413d4c80a9de89b12e18b5001ef5b1473c3 SHA-256: 97e0992b2a54652bbb7909cda126ea5c4d1219dd53c35f8f2876fc844767a91a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass of external links, with one specifically pointing to a known malicious redirector at https://ttraff.ru/pify?keyword=bhangra+punjabi+dance+video. This indicates a social engineering attempt to lure users to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=bhangra+punjabi+dance+video
    • http://sudufugol.lillianabel.com/uploads/1/3/1/8/131856145/defeduwegef.pdf
    • http://files.georgesgymllc.com/uploads/1/3/1/6/131637679/gexoledigawuda_kavewo.pdf
    • http://files.wetanddrypodcast.com/uploads/1/3/1/8/131856271/f85994bbf.pdf
    • http://files.tireservicesolutions.com/uploads/1/3/1/3/131379189/kidiseg_sivox_fojejabiwagixu.pdf
    • https://cdn.shopify.com/s/files/1/0433/2892/9960/files/mubap.pdf
    • https://cdn.shopify.com/s/files/1/0433/6245/1611/files/26196899517.pdf
    • https://cdn.shopify.com/s/files/1/0429/7146/3831/files/tukafasewawekazexuxu.pdf
    • https://cdn.shopify.com/s/files/1/0438/3057/5266/files/nwn2_eldritch_knight.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zugazad.pdf
    • https://cdn.shopify.com/s/files/1/0429/6910/4540/files/17938646738.pdf
    • https://cdn.shopify.com/s/files/1/0431/7360/9636/files/midarowito.pdf
    • https://cdn.shopify.com/s/files/1/0430/0131/5491/files/6391832598.pdf
    • https://cdn.shopify.com/s/files/1/0440/2325/1094/files/duluf.pdf
    • https://cdn.shopify.com/s/files/1/0450/8552/4120/files/agrarian_reform_law_review.pdf
    • https://cdn.shopify.com/s/files/1/0449/2158/5831/files/adverb_of_manner_worksheet.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000046b8.bin
aba2d8a88eb375cde47ebbfb287a1d1b9b8e0e9ef23ab76248bc114e5d4ed9b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x46B8 5252 bytes
font_01_sfnt_off0000587c.bin
9b6dc247bf88bd56d5ef05af5e8416349d6c689e25134e92672eb44183d0befe
pdf-font-stream PDF embedded font (sfnt) at offset 0x587C 9952 bytes
font_02_sfnt_off00007a9b.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A9B 4324 bytes